Uni is remarried to Kozo, who has two Kobu brothers. From the time of the wedding greeting, she tries her best to act as a mother to her brother who has a cold attitude towards the sea urchin, but it doesn't go well. Meanwhile, in the mornings when Kozo is not at work, she begins to complain, "If you're a mother, let me suck your breasts, otherwise I won't recognize you as a mother."